Tudor Black Bay 58 vs Omega Seamaster Diver 300M: New and Pre-Owned

The Tudor Black Bay 58 and the Omega Seamaster Diver 300M are the two obvious steel dive watches for a buyer who wants a real diver with Swiss pedigree and a price well below a Rolex. The Tudor is a 39 mm, 200 m watch with a vintage 1958 look. The Omega is a 42 mm, 300 m watch with a ceramic bezel that Omega sold for years as the Seamaster Professional 300M. Both now carry METAS Master Chronometer certification, and both are widely available. This page compares what you can buy new today and the earlier generations that circulate pre-owned.

Tudor Black Bay 58 vs Omega Seamaster Diver 300M at a glance

Current flagship models compared side by side. Facts and prices checked October 2026; see each lineup below for every current variation.

Current Tudor Black Bay 58 lineup and variations

Tudor prices are US retail as reported by Time+Tide (April 15, 2026), Everest Bands (April 16, 2026) and The Watchology (July 2026, updated October 9, 2026). tudorwatch.com returned an error when we fetched it, so none of these is a first-party reading, and one guide, WatchScanning (August 16, 2026), lists lower figures of $4,500 (three-link) and $4,850 (five-link), which we treat as the outlier. The Black Bay 58 GMT is a separate model: it uses the same 39 mm case and is listed at about $5,650 on a five-link bracelet (Time+Tide), but we do not compare it here. The silver, bronze and 18K versions are listed by The Watchology and WatchScanning with prices that disagree, so check them with a dealer. The blue 79030B and the earlier black 79030N are off the catalogue.

Full history and every generation: Tudor Black Bay 58 history.

Current Omega Seamaster Diver 300M lineup and variations

Full history and every generation: Omega Seamaster Diver 300M history.

Prior generations: what you can buy pre-owned

Both watches changed meaningfully in 2018 (Omega) and 2025 (Tudor), and that split matters for pre-owned buyers: the pre-2018 Omega and the pre-2025 Tudor use older calibres and, in Tudor's case, a thicker case. Pre-owned figures are indicative. They come from WatchScanning (August 16, 2026), The Watchology (October 9, 2026), Bob's Watches listings and a Loupe This estimate (all observed in October 2026), and individual dealer asking prices, not sold prices. Where a source gave no dated figure we say so.

Tudor Black Bay 58: generations

Omega Seamaster Diver 300M: generations

Heritage: a 1958 Big Crown against a 1957 Seamaster 300

Both brands point to the late 1950s, and both do it carefully. The Black Bay 58 takes its name from 1958, the year Tudor's first 200 m diver arrived. That watch, the Oyster Prince Submariner reference 7924 or 'Big Crown', was 37 mm, with an 8 mm screw-down crown, a thicker domed crystal than its 100 m predecessor, the 7922 of 1954, and Tudor's caliber 390 (Fratello). The modern Black Bay 58 keeps the snowflake hands and rivet-style bracelet but uses a 39 mm case and a modern manufacture calibre. Tudor's modern Black Bay line began in 2012, and the Fifty-Eight followed in 2018 as the smaller, thinner version of it.

Omega's heritage runs the other way. In 1957 it introduced the Speedmaster, the Railmaster and the Seamaster 300, which Wikipedia describes as designed for professional divers. The modern Seamaster Diver 300M is not that watch: Wikipedia treats the Seamaster 300 as a separate heritage model, and Omega's own page for the Diver 300M says 'Since 1993'. That year's Seamaster Professional Diver 300M had a helium escape valve, skeleton hands and a wave dial, and James Bond made it famous from GoldenEye in 1995.

Naming adds to the confusion. Bob's Watches calls the 1993 launch the Seamaster Professional Diver 300M and later uses Seamaster Diver 300M; Omega's current pages use Diver 300M, though the dial of the No Time To Die edition pictured below still reads Seamaster Professional. We could not find a date for the change of name. In short, the Tudor is a modernised reissue of a specific 1958 watch, while the Omega is a 1993 design with its own lineage, which is why the two differ so much in size and character.

Design and wearing experience

The numbers define the experience. The Tudor is 39 mm across and 11.7 mm thick, with a lug-to-lug of just over 46 mm and 20 mm lugs. The Omega is 42 mm across and 13.56 mm thick, with a 49.9 mm lug-to-lug and about 194 g on the official page. We found no sourced weight for the Tudor. The Watchology says the Tudor's short lug-to-lug suits wrists of about 6 to 7.5 inches, and Monochrome called it 'fairly compact' on a 16.5 cm wrist. The Watchology's review of the Omega says it fills a 7-inch wrist and puts 6.5 inches at the edge of comfort.

The finish differs as much as the size. The Tudor has an anodised aluminium bezel with a matte, vintage look, and The Watchology warns it will show wear in a way a ceramic bezel does not. The Omega has a black ceramic bezel with a white enamel scale, a polished ceramic dial with a wave pattern on the base model, a conical helium valve and a transparent sapphire caseback. The Tudor has a solid screwed caseback and a domed sapphire crystal. On the wrist, the Tudor's T-fit clasp gives 8 mm of tool-free adjustment; the Omega's clasp has a comfort setting and a diver extension, though The Watchology says it is 'solid but not as smooth' as Rolex's Oysterlock.

Sportier and larger, or smaller and more discreet: that is the real choice. The Tudor's riveted bracelet is dressier but adds wrist presence, according to The Watchology, and its oversized crown is easy to use with wet or gloved hands.

Movement and technology

Both watches are now METAS Master Chronometers resisting 15,000 gauss, which was not true of the Tudor before 2025. The Black Bay 58's MT5400-U is made with Kenissi, runs at 28,800 vph, uses a silicon balance spring and has 27 jewels. METAS certifies it to 0/+5 seconds per day with a minimum 65-hour power reserve. The Omega's Calibre 8800 runs at 3.5 Hz with a 55-hour reserve and is certified at 0/+6 seconds per day for the cased watch. The no-date Omega models and the titanium 007 edition use Calibre 8806.

The Tudor has the longer reserve and the higher beat rate. The Omega has the greater water resistance, 300 m against 200 m, and Omega's co-axial escapement, which Bob's Watches notes Omega has held sole rights to since 1993. A buyer who dives seriously will care about the 300 m figure; a buyer who wears the watch on weekends will prefer the extra ten hours of reserve.

The Tudor's calibre history is also worth knowing. The 2018 Black Bay Fifty-Eight launched with the MT5402, which SJX described as 70 hours with a silicon hairspring and COSC certification. By 2021 a slightly modified MT5400 was fitted, and the 2025 generation replaced it with the MT5400-U, trading a nominal 70 hours for a METAS-certified 65-hour minimum. Some dealer guides still quote 70 hours for the current watch, which describes the earlier calibre. On the Omega side, the model moved from the Cal 1120 to the Co-Axial Cal 2500 family and, in 2018, to the Cal 8800 with a date moved from three o'clock to six.

Value, resale and availability

Tudor's top steel price of $5,350 sits $1,350 below Omega's $6,700 base price, about 20% less. The gap is wider if you compare cheaper straps with Omega's special editions, which start at $6,900 and climb to $9,400 for the 60th Anniversary model. Neither brand has a documented waitlist: The Watchology says Tudor dealers can usually source a current Black Bay 58 within weeks, and its review of the Omega says authorised dealer stock is generally available.

Resale is where the older models matter. WatchScanning puts the 2025-generation Tudor at about $4,300 pre-owned, or about 89% of list, and the discontinued 79030N at about $2,935, or 75% of its final $3,920 list price. The Watchology says a pre-owned Omega Diver 300M resells at 70 to 80% of retail, and WatchScanning puts the steel bracelet model at $4,300 to $5,200, about 28% below retail. That makes a 2018 or later Omega roughly equal to a new Tudor in price, which is the point at which the comparison gets interesting.

For a pre-owned buyer, the sweet spot is on the Tudor side the 79030N from about $2,800 to $3,800 and on the Omega side the pre-2018 Cal 2500 generation at about $2,800 to $3,800, or an early 2531.80 serviced at $1,800 to $3,000. These are indicative ranges from October 2026 sources, and condition, box and papers move them. A warranty card with remaining cover typically adds 10 to 15% to a pre-owned Tudor, according to WatchScanning.

New or pre-owned: how to choose

Buy new if you want the 2025 and later Tudor, with METAS certification and the five-link bracelet, or one of Omega's colours and special editions. The new Tudor is the lower-priced option and has a five-year warranty according to The Watchology. The new Omega costs more, but you get a larger case, a ceramic bezel and 300 m of water resistance.

Buy pre-owned if you want either watch for $3,000 to $5,000. A 79030N or 79030B (the blue is now off the catalogue) brings the Tudor to about $3,500 or less in the listings we found, and a 2018 or later Omega steel model reaches about $4,300 to $5,200. Check which generation you are buying: 11.9 mm versus 11.7 mm on the Tudor, and the Cal 2500 versus the Cal 8800 on the Omega.

A final point about authenticity. WatchScanning notes that the Black Bay line is among the most-faked watches under $10,000, so buy from reputable sellers and confirm the serial and papers.

Which should you buy?

Myths and mix-ups, corrected

• “The Black Bay 58 has a 70-hour reserve.” Only the 2018 to 2024 models did. The current MT5400-U is certified for a minimum of 65 hours, according to Monochrome and Revolution.
• “The Black Bay 58 is a COSC-only watch.” The 2025 and 2026 models carry both COSC and METAS Master Chronometer certification, tested at 0/+5 seconds per day and 15,000 gauss.
• “The Seamaster Diver 300M is the modern version of the 1957 Seamaster 300.” Wikipedia treats them as separate lines. The Diver 300M dates from 1993, while the Seamaster 300 is Omega's heritage model.
• “There is a current blue Black Bay 58.” The blue 79030B is off the catalogue: The Watchology says it was discontinued in 2026 and Luxury Bazaar calls it discontinued 'for now'.
• “The Black Bay 58 GMT is the same watch with a GMT hand.” It is a separate model priced at about $5,650 on a five-link bracelet, so we have not compared it here.

Sources

Time+Tide (Tudor at Watches and Wonders 2026, April 15, 2026), Everest Bands (Black Bay 58 METAS black, April 16, 2026), Monochrome (Black Bay 58 Burgundy hands-on, April 10, 2025), Revolution Watch (Tudor at Watches and Wonders 2025, April 2, 2025), The Watchology (Black Bay 58 buying guide, July 14, 2026, updated October 9, 2026; Black Bay review, updated September 5, 2026; Seamaster Diver 300M guide and review, updated October 8 and 9, 2026), WatchScanning (Tudor and Omega price guides, August 16, 2026), Luxury Bazaar (Tudor discontinuations, April 23, 2026), SJX (Black Bay Fifty-Eight, March 22, 2018; Bronze, June 23, 2021), Worn and Wound (Fifty-Eight 925 and 18K, April 7, 2021), T3 (Navy Blue launch price), Fratello (7924, April 1, 2014), 5DWatches (April 24, 2026), Bob's Watches (79030B listing and Diver 300M guide and listings, October 14 and 15, 2026), Omega US product and catalogue pages (October 14, 2026), Watches of Switzerland (007 First Light), Loupe This (2254.50 estimate), Watchonista and Wikipedia (Seamaster histories). Tudor's own website (tudorwatch.com) returned an error when fetched, so every Tudor price is second-hand, and the catalogue status and exact US prices of the 925, Bronze and 18K versions could not be confirmed. Prices are indicative figures retrieved on the observed dates; Omega prices were read from omegawatches.com on October 14, 2026, and no Omega reference we could not read has been listed as discontinued.

Frequently Asked Questions

What is the difference between the Tudor Black Bay 58 and the Omega Seamaster Diver 300M?

The Black Bay 58 is a 39 mm, 11.7 mm thick, 200 m watch with an aluminium bezel and a 65-hour reserve, priced at $4,975 to $5,350 in steel. The Diver 300M is a 42 mm, 13.56 mm thick, 300 m watch with a ceramic bezel and a 55-hour reserve, from $6,700.

How much is a new Tudor Black Bay 58 in 2026?

Three sources dated April to July 2026 list $4,975 on rubber, $5,225 on the three-link bracelet and $5,350 on the five-link bracelet. WatchScanning lists $4,500 and $4,850 for the bracelets, so confirm with an authorised dealer.

How much is a new Omega Seamaster Diver 300M?

Omega's US site listed the steel bracelet black, blue, white and grey models at $6,700 on October 14, 2026, with rubber-strap versions at $6,300, though some were unavailable online. Special editions run from $7,300 to $9,400 in steel.

Is the Black Bay 58 a METAS Master Chronometer?

Yes, since 2025. The MT5400-U is certified by both COSC and METAS, with 0/+5 seconds per day accuracy and 15,000 gauss resistance. The earlier 79030N was COSC only.

Which is better for diving, the Black Bay 58 or the Seamaster Diver 300M?

The Seamaster Diver 300M has the higher rating: 300 m against 200 m, plus a ceramic bezel and a helium valve. The Black Bay 58 is rated to 200 m, which is still more than recreational use needs.

What is a Tudor Black Bay 58 worth pre-owned?

WatchScanning puts the discontinued 79030N at about $2,935 and the 2025 generation at about $4,300. Chrono24 complete sets of the 79030N were $2,780 to $3,800 in April 2026.

Is the Omega Seamaster Diver 300M the same as the Seamaster Professional 300M?

Yes. Omega launched it in 1993 as the Seamaster Professional Diver 300M and now calls it the Diver 300M. We could not find the date of the name change, and the dial of the No Time To Die edition still reads Seamaster Professional.

Is the Tudor Black Bay 58 blue discontinued?

Yes. The Watchology says the blue-dial Black Bay 58 was discontinued in 2026, and the current catalogue shows black with gilt and burgundy dials. Luxury Bazaar says the blue is discontinued for now.

Which wears smaller, the Black Bay 58 or the Seamaster Diver 300M?

The Black Bay 58 wears smaller: 39 mm and 11.7 mm thick, against 42 mm and 13.56 mm, with a lug-to-lug of just over 46 mm against 49.9 mm.

Related Reading

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